fix xua_msg_dump(): convert message length to the host's byte order

This fixes bogus messages like this one:

  Received MGMT_ERR 'Invalid Routing Context':
      HDR=(MGMT:ERROR,V=1,LEN=268435456), PART(T=Error Code,L=4,D=00000019)
                          ^^^^^^^^^^^^^

Change-Id: I516e486fb7b51a25e33965ed5a0f12ab4488d240
---
M src/xua_msg.c
1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/xua_msg.c b/src/xua_msg.c
index 5671e1a..067c8dd 100644
--- a/src/xua_msg.c
+++ b/src/xua_msg.c
@@ -531,7 +531,7 @@
 	buf[0] = '\0';
 
 	OSMO_STRBUF_PRINTF(sb, "HDR=(%s,V=%u,LEN=%u)", xua_hdr_dump(xua, dialect),
-			   xua->hdr.version, xua->hdr.msg_length);
+			   xua->hdr.version, ntohl(xua->hdr.msg_length));
 
 	llist_for_each_entry(part, &xua->headers, entry)
 		OSMO_STRBUF_PRINTF(sb, ", PART(T=%s,L=%u,D=%s)",

